Rockwell Automation 1794-IF4I, -OF4I, IF2XOF2I, -IF4IXT, -IF4ICFXT, -OF4IXT, IF2XOF2IXT FLEX I/O Isolated Analog Modules User Manual
Page 94
Publication 1794-6.5.8 - January 2010
94 Communication and I/O Image Table Mapping with the DeviceNet/ControlNet Adapter
Table 5.15
Word/Bit Descriptions for the 1794-IF2XOF2I Isolated Analog Combo Module
Write Word
Decimal Bit
(Octal Bit)
Definition
Word 0
Bits 00–15
(00–17)
Input Channel 0 input data – 16-bit unipolar; 15-bit plus sign bipolar
Word 1
Bits 00–15
(00–17)
Input Channel 1 input data – 16-bit unipolar; 15-bit plus sign bipolar
Word 2
Bits 00–15
(00–17)
Read Back Output Channel 0 – During normal operation, it is a copy of the output of
channel 0. During an EN transition, it is the condition of the output as determined by S1
and S0.
Word 3
Bits 00–15
(00–17)
Read Back Output Channel 1 – During normal operation, it is a copy of the output of
channel 1. During an EN transition, it is the condition of the output as determined by S1
and S0.
Word 4
Bits 00–15
(00–17)
Real Time Sample. The fixed time period you set telling the module when to provide
data to the processor.
Word 5
Bits 00
Reserved
Bits 01
Calibration Done bit (DN). – This bit is set to 1 after a calibration cycle is completed.
Bits 02
Calibration Bad bit (BD). – This bit is set to 1 if the channel calibration coefficients
cannot be saved or read properly.
Bits 03-07
Set to 0.
Bits 08-11
(10-12)
Reserved
Bit 12 (14)
Set to 0
Bit 13 (15)
Configuration mode bit (CF) – This bit is set (1) when the configuration mode is
selected (bit 15, word 6 in the block transfer write set to 1). When this bit is set (1), the
module status indicator flashes.
Bit 14 (16)
Field Power Off bit (FP) – This bit is set (1) when the 24V field power fails. When this
bit is set (1), the module status indicator flashes.
Bit 15 (17)
Power Up (unconfigured state) bit (PU). – This bit is set (1) when the configuration
word is all zeroes (0) due to a reset (adapter power cycle or module insertion) or a
cleared configuration word (all 0). When this bit is set (1), the module status indicator
flashes.